122215717 has 8 divisors (see below), whose sum is σ = 131717880. Its totient is φ = 112728000.

The previous prime is 122215693. The next prime is 122215729. The reversal of 122215717 is 717512221.

It can be written as a sum of positive squares in 4 ways, for example, as 14699556 + 107516161 = 3834^2 + 10369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122215717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122215747) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19467 + ... + 24967.

It is an arithmetic number, because the mean of its divisors is an integer number (16464735).

Almost surely, 2^122215717 is an apocalyptic number.

It is an amenable number.

122215717 is a deficient number, since it is larger than the sum of its proper divisors (9502163).

122215717 is a wasteful number, since it uses less digits than its factorization.

122215717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7223.

The product of its digits is 1960, while the sum is 28.

The square root of 122215717 is about 11055.1217541916. The cubic root of 122215717 is about 496.2597129396.

Adding to 122215717 its reverse (717512221), we get a palindrome (839727938).

The spelling of 122215717 in words is "one hundred twenty-two million, two hundred fifteen thousand, seven hundred seventeen".